Implement Blue ET700 protocol

1 files changed, 113 insertions, 0 deletions

diff --git a/src/main/java/org/traccar/protocol/BlueProtocolDecoder.java b/src/main/java/org/traccar/protocol/BlueProtocolDecoder.java
new file mode 100644
index 000000000..98a8ae565
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/BlueProtocolDecoder.java
@@ -0,0 +1,113 @@
+/*
+ * Copyright 2019 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.BitUtil;
+import org.traccar.helper.DateBuilder;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+
+public class BlueProtocolDecoder extends BaseProtocolDecoder {
+
+    public BlueProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private double readCoordinate(ByteBuf buf, boolean negative) {
+
+        int value = buf.readUnsignedShort();
+        int degrees = value / 100;
+        double minutes = value % 100 + buf.readUnsignedShort() * 0.0001;
+        double coordinate = degrees + minutes / 60;
+        return negative ? -coordinate : coordinate;
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        buf.readUnsignedByte(); // header
+        buf.readUnsignedShort(); // length
+        buf.readUnsignedByte(); // version
+        buf.readUnsignedByte();
+
+        String id = String.valueOf(buf.readUnsignedInt());
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, id);
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        while (buf.readableBytes() > 1) {
+
+            int frameEnd = buf.readerIndex() + buf.readUnsignedByte();
+
+            int type = buf.readUnsignedByte();
+            buf.readUnsignedByte(); // reference id
+            buf.readUnsignedByte();
+            buf.readUnsignedByte(); // flags
+
+            if (type == 0x01) {
+
+                buf.readUnsignedByte(); // reserved
+                int flags = buf.readUnsignedByte();
+
+                position.setValid(BitUtil.check(flags, 7));
+                position.setLatitude(readCoordinate(buf, BitUtil.check(flags, 6)));
+                position.setLongitude(readCoordinate(buf, BitUtil.check(flags, 5)));
+                position.setSpeed(buf.readUnsignedShort() + buf.readUnsignedShort() * 0.001);
+                position.setCourse(buf.readUnsignedShort() + buf.readUnsignedByte() * 0.01);
+
+                DateBuilder dateBuilder = new DateBuilder()
+                        .setDate(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte())
+                        .setTime(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte());
+                position.setTime(dateBuilder.getDate());
+
+                buf.readUnsignedShort(); // lac
+                buf.readUnsignedShort(); // cid
+
+            } else if (type == 0x12) {
+
+                int status;
+
+                status = buf.readUnsignedByte(); // status 1
+                position.set(Position.KEY_ALARM, BitUtil.check(status, 1) ? Position.ALARM_VIBRATION : null);
+
+                buf.readUnsignedByte(); // status 2
+                buf.readUnsignedByte(); // status 3
+                buf.readUnsignedByte(); // status 4
+                buf.readUnsignedByte(); // status 5
+                buf.readUnsignedByte(); // status 6
+
+            }
+
+            buf.readerIndex(frameEnd);
+        }
+
+        return position.getFixTime() != null ? position : null;
+    }
+
+}